TDA7391 35W BRIDGE CAR RADIO AMPLIFIER HIGH POWER CAPABILITY: 40W/4Ω MAX 35W/4Ω EIAJ 45W/3.2Ω MAX 40W/3.2Ω EIAJ 32W/3.2Ω @ VS = 14.4V, f = 1KHz, d = 10% 26W/4Ω @ VS = 14.4V, f = 1KHz, d = 10% DIFFERENTIAL INPUTS (EITHER SINGLE ENDED OR DIFFERENTIAL INPUT SIGNAL ARE ACCEPTED) MINIMUM EXTERNAL COMPONENT COUNT: - NO BOOTSTRAP CAPACITORS - NO BOUCHEROT CELLS - INTERNALLY FIXED GAIN (30dB) - NO SVR CAPACITOR ST.-BY FUNCTION (CMOS COMPATIBLE) PROGRAMMABLE TURN-ON/OFF DELAY NO AUDIBLE POP DURING MUTE AND STBY OPERATIONS Multiwatt11 ORDERING NUMBER: TDA7391 ESD DESCRIPTION The TDA7391 is a BRIDGE class AB audio power amplifier specially intended for car radio High Power applications. The high power capability together with the possibility to operate either in DIFFERENTIAL INPUT MODE or SINGLE ENDED INPUT MODE makes it suitable for boosters and high end car radio equipments. The exclusive fully complementary output stage and the internal fixed gain configuration drop the external component count. The on board clipping detector allows easy implementation of gain compression systems. PROTECTIONS: SHORT CIRCUIT (TO GND, TO VS, ACROSS THE LOAD) VERY INDUCTIVE LOADS CHIP OVERTEMPERATURE LOAD DUMP OPEN GND Figure 1: Test And Application Circuit +VS IN+ 2 3 9 7 C1 0.22µF IN- 1 VS SW1 ST-BY C3 33µF C4 1000µF C5 100nF C2 0.22µF TDA7391 5 8 11 10 6 R2 56KΩ 4 OUT+ OUT- CD Vref R1 4.7KΩ TO µC GND D94AU133 October 1998 1/8 This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice. TDA7391 Figure 2: Block Diagram V CC1 VCC2 3 9 + SHORT CIRCUIT DUMP & THERMAL PROTECTION REFERENCES STANDBY THRESHOLD IN- 1 5 POWER AMP COMMON MODE - ICM LTS + V=f (Tj) LTS DISABLE 4 OUT- CD V CC/2 IN+ POWER AMP - 2 gm + THD DETECT OUT+ VS PROGRAMMABLE CURRENT CIRCUIT + MUTE THRESHOLD 7 11 MUTE 10 6 SYNC GND 8 STANDBY D94AU134 PIN CONNECTION (Top view) TAB CONNECTED TO PIN 6 11 MUTE 10 SYNC 9 +VS 8 STAND-BY 7 OUT+ 6 GND 5 OUT- 4 CD 3 +VS 2 IN+ 1 IN- D94AU135 THERMAL DATA Symbol Rth j-case 2/8 Description Thermal Resistance Junction-case Max Value Unit 1.8 °C/W TDA7391 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VS DC Supply Voltage 28 V VOP Operating Supply Voltage 18 V Peak Supply Voltage (t = 50ms) 50 V Output Peak Current repetitive (f > 10Hz) Output Peak Current non repetitive 4.5 6 A A 43 W -40 to 150 °C VPEAK IO Ptot Tstg, Tj Power Dissipation (T CASE = 85°C) Storage and Junction-Case Temperature ELECTRICAL CHARACTERISTICS (VS = 14.4V; RL = 4Ω, f = 1KHz, Tamb = 25°C, unless otherwise specified) Symbol Parameter VS Supply Voltage Range Iq Total Quiescent Current Test Condition 60 Output Offset Voltage ISB ST-BY Current VST-BY = 1.5V ISBin ST-BY Input Bias Current VST-BY = 5V ST-BY On Threshold Voltage VSBoff ST-BY Off threshold Voltage ATTST-BY ST-BY Attenuation Mute Input Bias Current Mute Attenuation PO Output Power d = 10% d = 1% d = 10%; RL = 3.2Ω EIAJ Output Power (*) VS = 13.7V; RL = 3.2Ω MAX Output Power (*) VS = 14.4V; RL = 3.2Ω d Voltage Gain High Frequency rolloff R IN Input Impedance 150 mA 120 mV 100 µA 10 µA 1.5 V 20 29.5 PO = 1W; -3dB dB 10 PO = 0.1 to 15W fH V V (VMUTE = 5V) Distortion GV Unit 18 90 AM PO MAX Max. 3.5 IM in PO EIAJ Typ. 8 VOS VSBon Min. µA 90 dB 26 21 32 W W W 40 W 45 W 0.06 0.03 % % 30 30.5 75 dB KHz Differential 36 60 KΩ Single Ended 30 55 KΩ mV Input Noise Voltage R g = 0Ω ; f = 22Hz to 22KHz 4 Input Common Mode Rejection f = 1KHz; VIN = 1Vrms 65 dB SVR Supply Voltage Rejection R g = 0Ω; Vr = 1Vrms 60 dB CDL Clipping Detection Level T sd Absolute Thermal Shutdown Junction Temperature EIN CMRR 5 10 160 15 % °C (*) Saturated sqare wave output. 3/8 TDA7391 FUNCTIONAL DESCRIPTION Pin Function Description 1, 2 INPUTS The input stage is a high impedance type also capable of operation in single ended mode with one input capacitively coupled to the signal GND. The impedance seen by the inverting and non inverting input pins must be matched. 3,9 +VS Supply Voltage. 4 CD The TDA7391 is equipped with a diagnostic circuitry able to detect the clipping in the Output Signal (distortion = 10%). The CD pin (open collector) gives out low level signal during clipping. The output stage is a bridge type able to drive loads as low as 3.2Ω. It consists of two class AB fully complementary PNP/NPN stages fully protected. A rail to rail output voltage swing is achieved without need of bootstrap capacitors. No external compensation is necessary. 5, 7 OUTPUTS 6 GND 8 STAND-BY 10 SYNC A resistor (R2) has to be connect between pin 10 and GND in order to program the current that flows in the C 3 capacitor (pin 11). The values of C3 and R2 determine the time required to bias the amplifier. 11 MUTE The pin will have a capacitor (C3) tied to GND to set the MUTE/STAND-BY time. An automatic Mute during turn on/off is provided to prevent noisy transients. Ground. The device features a ST-BY function which shuts down all the internal bias supplies when the ST-BY pin is low. In ST-BY mode the amplifier sinks a small current (in the range of few µA). When the ST-BY pin is high the IC becomes fully operational. Figure 3: P.C. Board and Component Layout of the Fig. 1 (1:1 scale). 4/8 TDA7391 Figure 4: Quiescent Current vs Supply Voltage Figure 5: EIAJ power vs Supply Voltage RL = 3.2Ω RL = 4Ω Figure 6: Output Power vs Supply Voltage (@ RL = 4Ω) Figure 7: Distortion vs Frequency (@ RL = 4Ω) VS = 14.4V RL = 4Ω PO = 12W R L = 4Ω f = 1KHz f = (Hz) Figure 8: Output Power vs Supply Voltage (@ RL = 3.2Ω) Figure 9: Distortion vs Frequency (RL =4Ω) VS = 14.4V RL = 3.2Ω PO = 15W R L = 3.2Ω f = 1KHz f = (Hz) 5/8 TDA7391 Figure 10: Supply Voltage Rejection vs Frequency Figure 11: Common Mode Rejection vs. Frequency VS = 14.4V Vr = 1Vrms RL = 4Ω Rg = 0 VS = 14.4V Vcm = 1Vrms RL = 4Ω Rg = 0 f = (Hz) f = (Hz) Figure 12: TotalPower Dissipation & Efficiency vs. Output Power (@ RL = 4Ω) VS = 14.4V R L = 4Ω f = 1KHz PO (W) 6/8 Figure 13: Power Bandwidth VS = 14.4V R L = 4Ω PO = 1W f = (Hz) TDA7391 DIM. mm MIN. TYP. A B inch MAX. MIN. TYP. 5 2.65 C MAX. 0.197 0.104 1.6 OUTLINE AND MECHANICAL DATA 0.063 D E 1 0.039 0.49 0.55 0.019 0.022 F 0.88 0.95 0.035 0.037 G G1 1.45 16.75 1.7 17 1.95 17.25 0.057 0.659 H1 19.6 0.067 0.669 0.077 0.679 0.862 0.874 0.795 0.886 0.87 0.886 0.772 H2 L 21.9 22.2 20.2 22.5 L1 21.7 22.1 22.5 0.854 L2 17.4 18.1 0.685 L3 L4 17.25 10.3 17.5 10.7 17.75 10.9 0.679 0.406 0.689 0.421 0.699 0.429 L7 M 2.65 4.25 4.55 2.9 4.85 0.104 0.167 0.179 0.114 0.191 M1 4.73 5.08 5.43 0.186 0.200 0.214 S S1 1.9 1.9 2.6 2.6 0.075 0.075 0.102 0.102 Dia1 3.65 3.85 0.144 0.152 0.713 Multiwatt11 V 7/8 TDA7391 Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics 1998 STMicroelectronics – Printed in Italy – All Rights Reserved MULTIWATT is a Registered Trademark of SGS-THOMSON Microelectronics STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com 8/8